From 7ddd55f5d9bdf7362bd5ac07ebc66cca85915242 Mon Sep 17 00:00:00 2001
From: Matt Turner <mattst88@gmail.com>
Date: Fri, 14 Nov 2008 00:16:29 +0000
Subject: -- Remove stop watch functions from bitfield.c

git-svn-id: svn://mattst88.com/svn/cleanbench/trunk@23 0d43b9a7-5ab2-4d7b-af9d-f64450cef757
---
 bitfield.c | 178 +++++++++++++++++++++++++------------------------------------
 1 file changed, 74 insertions(+), 104 deletions(-)

diff --git a/bitfield.c b/bitfield.c
index 8256e52..6d0cf0b 100644
--- a/bitfield.c
+++ b/bitfield.c
@@ -4,6 +4,7 @@
 #include <string.h>
 #include <math.h>
 #include <limits.h>
+#include <time.h>
 
 #include "nmglobal.h"
 #include "nbench1.h"
@@ -13,7 +14,7 @@
 ** BITFIELD OPERATIONS **
 *************************/
 
-static unsigned long DoBitfieldIteration(unsigned long *bitarraybase,
+static clock_t DoBitfieldIteration(unsigned long *bitarraybase,
 		unsigned long *bitoparraybase,
 		long bitoparraysize,
 		unsigned long *nbitops);
@@ -34,22 +35,20 @@ static void FlipBitRun(unsigned long *bitmap,
 void
 DoBitops(void)
 {
-        /* Error context string */
-        const char *context = "CPU:Bitfields";
-        /* Local bitop structure */
-        BitOpStruct *locbitopstruct = &global_bitopstruct;
-
-        unsigned long *bitarraybase = NULL;     /* Base of bitmap array */
-        unsigned long *bitoparraybase = NULL;   /* Base of bitmap operations array */
-        unsigned long nbitops;                  /* # of bitfield operations */
-        unsigned long accumtime;                /* Accumulated time in ticks */
-        double iterations;                      /* # of iterations */
-        int ticks;
+        const char*     context = "CPU:Bitfields";
+        BitOpStruct*    locbitopstruct = &global_bitopstruct;
+        clock_t         total_time = 0;
+        int             iterations = 0;
+        unsigned long*  bitarraybase = NULL;
+        unsigned long*  bitoparraybase = NULL;
+        unsigned long   nbitops;
 
         /*
         ** See if we need to run adjustment code.
         */
-        if (locbitopstruct->adjust == 0) {
+        if (locbitopstruct->adjust == FALSE) {
+                locbitopstruct->adjust = TRUE;
+
                 bitarraybase = realloc(bitarraybase, locbitopstruct->bitfieldarraysize * sizeof(unsigned long));
                 if (!bitarraybase) {
                       fprintf(stderr, "Error in %s, could not allocate memory. Exitting...\n", context);
@@ -75,12 +74,7 @@ DoBitops(void)
                         ** minimum, then de-allocate the array, reallocate a
                         ** larger version, and try again.
                         */
-                        ticks = DoBitfieldIteration(bitarraybase,
-                                                   bitoparraybase,
-                                                   locbitopstruct->bitoparraysize,
-                                                   &nbitops);
-
-                        if (ticks > global_min_ticks) {
+                        if(DoBitfieldIteration(bitarraybase, bitoparraybase, locbitopstruct->bitoparraysize, &nbitops) > global_min_ticks) {
                                 break;
                         }
 
@@ -109,14 +103,10 @@ DoBitops(void)
         ** All's well if we get here.  Repeatedly perform bitops until the
         ** accumulated elapsed time is greater than # of seconds requested.
         */
-        accumtime = 0L;
-        iterations = 0.0;
         do {
-                accumtime += DoBitfieldIteration(bitarraybase,
-                                bitoparraybase,
-                                locbitopstruct->bitoparraysize,&nbitops);
-                iterations += (double)nbitops;
-        } while (TicksToSecs(accumtime) < locbitopstruct->request_secs);
+                total_time += DoBitfieldIteration(bitarraybase, bitoparraybase, locbitopstruct->bitoparraysize,&nbitops);
+                iterations += nbitops;
+        } while (total_time / CLOCKS_PER_SEC < locbitopstruct->request_secs);
 
         /*
         ** Clean up, calculate results, and go home.
@@ -126,11 +116,7 @@ DoBitops(void)
         free(bitarraybase);
         free(bitoparraybase);
 
-        locbitopstruct->bitopspersec = iterations / TicksToFracSecs(accumtime);
-
-        if (locbitopstruct->adjust == 0) {
-                locbitopstruct->adjust = 1;
-        }
+        locbitopstruct->bitopspersec = (double)(iterations * CLOCKS_PER_SEC) / (double)total_time;
 }
 
 /************************
@@ -139,90 +125,74 @@ DoBitops(void)
 ** Perform a single iteration of the bitfield benchmark.
 ** Return the # of ticks accumulated by the operation.
 */
-static unsigned long DoBitfieldIteration(unsigned long *bitarraybase,
-		unsigned long *bitoparraybase,
-		long bitoparraysize,
-		unsigned long *nbitops)
+static clock_t
+DoBitfieldIteration(unsigned long *bitarraybase, unsigned long *bitoparraybase, long bitoparraysize, unsigned long *nbitops)
 {
-long i;                         /* Index */
-unsigned long bitoffset;                /* Offset into bitmap */
-unsigned long elapsed;                  /* Time to execute */
-/*
-** Clear # bitops counter
-*/
-*nbitops=0L;
-
-/*
-** Construct a set of bitmap offsets and run lengths.
-** The offset can be any random number from 0 to the
-** size of the bitmap (in bits).  The run length can
-** be any random number from 1 to the number of bits
-** between the offset and the end of the bitmap.
-** Note that the bitmap has 8192 * 32 bits in it.
-** (262,144 bits)
-*/
-/*
-** Reset random number generator so things repeat.
-** Also reset the bit array we work on.
-** added by Uwe F. Mayer
-*/
-randnum((int32_t)13);
+        clock_t start, stop;
+        long i;
+        unsigned long bitoffset;
 
-for (i=0;i<global_bitopstruct.bitfieldarraysize;i++)
-{
+        /*
+        ** Clear # bitops counter
+        */
+        *nbitops = 0L;
+
+        /*
+        ** Construct a set of bitmap offsets and run lengths.
+        ** The offset can be any random number from 0 to the
+        ** size of the bitmap (in bits).  The run length can
+        ** be any random number from 1 to the number of bits
+        ** between the offset and the end of the bitmap.
+        ** Note that the bitmap has 8192 * 32 bits in it.
+        ** (262,144 bits)
+        */
+
+        /*
+        ** Reset random number generator so things repeat.
+        ** Also reset the bit array we work on.
+        ** added by Uwe F. Mayer
+        */
+        randnum(13);
+
+        for (i = 0; i < global_bitopstruct.bitfieldarraysize; i++) {
 #ifdef _LP64
-	*(bitarraybase+i)=(unsigned long)0x5555555555555555;
+                *(bitarraybase+i) = 0x5555555555555555UL;
 #else
-	*(bitarraybase+i)=(unsigned long)0x55555555;
+                *(bitarraybase+i) = 0x55555555UL;
 #endif
-}
+        }
 
-randnum((int32_t)13);
-/* end of addition of code */
+        randnum(13);
 
-for (i=0;i<bitoparraysize;i++)
-{
-	/* First item is offset */
-        /* *(bitoparraybase+i+i)=bitoffset=abs_randwc(262140L); */
-	*(bitoparraybase+i+i)=bitoffset=abs_randwc((int32_t)262140);
+        for (i = 0; i < bitoparraysize; i++) {
+                /* First item is offset */
+                *(bitoparraybase + i + i) = bitoffset = abs_randwc((int32_t)262140);
 
-	/* Next item is run length */
-	/* *nbitops+=*(bitoparraybase+i+i+1L)=abs_randwc(262140L-bitoffset);*/
-	*nbitops+=*(bitoparraybase+i+i+1L)=abs_randwc((int32_t)262140-bitoffset);
-}
+                /* Next item is run length */
+                *nbitops += *(bitoparraybase + i + i + 1L) = abs_randwc((int32_t)262140 - bitoffset);
+        }
 
-/*
-** Array of offset and lengths built...do an iteration of
-** the test.
-** Start the stopwatch.
-*/
-elapsed=StartStopwatch();
+        start = clock();
+
+        for(i = 0; i < bitoparraysize; i++) {
+                switch(i % 3) {
+                case 2: /* Complement run of bits */
+                        FlipBitRun(bitarraybase,
+                                *(bitoparraybase+i+i),
+                                *(bitoparraybase+i+i+1));
+                        break;
+                default:
+                        ToggleBitRun(bitarraybase,
+                                *(bitoparraybase+i+i),
+                                *(bitoparraybase+i+i+1),
+                                !i);
+                        break;
+                }
+        }
 
-/*
-** Loop through array off offset/run length pairs.
-** Execute operation based on modulus of index.
-*/
-for(i = 0; i < bitoparraysize; i++) {
-	int asdf = i % 3;
-	switch(asdf) {
-	case 2: /* Complement run of bits */
-		FlipBitRun(bitarraybase,
-			*(bitoparraybase+i+i),
-			*(bitoparraybase+i+i+1));
-		break;
-	default:
-		ToggleBitRun(bitarraybase,
-			*(bitoparraybase+i+i),
-			*(bitoparraybase+i+i+1),
-			!i);
-		break;
-	}
-}
+        stop = clock();
 
-/*
-** Return elapsed time
-*/
-return(StopStopwatch(elapsed));
+        return stop - start;
 }
 
 /***************
-- 
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